 When it's hot, too hot, your body will usually tell you. Feeling tired or fatigued or may start to get a headache. Those are some of the early things, just things that we all experience. Perspiring more, feeling thirsty. And hopefully when you're noticing those types of signs in an environment where you've had significant heat exposure, you start to pay attention to that to try to do things to cool yourself down. Atrium Health's Dr. Chris Branner. So what to do? Follow common sense for one thing, taking sips of water, find some shade or somewhere cool and just park it for a bit.